title: Inhibition of Pseudomonas aeruginosa and Escherichia coli O157:H7 biofilm formation by plant metabolite ε-viniferin.
abstract: Pathogenic biofilms are associated with persistent infection due to their high resistances to diverse antibiotics. Pseudomonas aeruginosa infects plants, animals, and humans and is a major cause of nosocomial diseases in patients with cystic fibrosis. In the present study, the antibiofilm abilities of 522 plant extracts against P. aeruginosa PA14 were examined. Three Carex plant extracts at a concentration of 200 μg/mL inhibited P. aeruginosa biofilm formation by >80% without affecting planktonic cell growth. In the most active extract of Carex pumila , resveratrol dimer ε-viniferin was one of the main antibiofilm compounds against P. aeruginosa. Interestingly, ε-viniferin at 10 μg/mL inhibited biofilm formation of enterohemorrhagic Escherichia coli O157:H7 by 98%. Although Carex extracts and trans-resveratrol are known to possess antimicrobial activity, this study is the first to report that C. pumila extract and ε-viniferin have antibiofilm activity against P. aeruginosa and E. coli O157:H7.
authors.affiliation: School of Chemical Engineering and ‡School of Mechanical Engineering, Yeungnam University , Gyeongsan 712-749, Republic of Korea.
authors.forename: Hyun Seob
authors.initials: HS
authors.lastname: Cho
authors.forename: Jin-Hyung
authors.initials: JH
authors.lastname: Lee
authors.forename: Shi Yong
authors.initials: SY
authors.lastname: Ryu
authors.forename: Sang Woo
authors.initials: SW
authors.lastname: Joo
authors.forename: Moo Hwan
authors.initials: MH
authors.lastname: Cho
authors.forename: Jintae
authors.initials: J
authors.lastname: Lee
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001572:Benzofurans / Q000494:pharmacology*; D018441:Biofilms / Q000187:drug effects / Q000254:growth & development; D031255:Carex Plant / Q000737:chemistry*; D004305:Dose-Response Relationship, Drug; D004353:Drug Evaluation, Preclinical / Q000379:methods; D019453:Escherichia coli O157 / Q000187:drug effects* / Q000502:physiology; D010936:Plant Extracts / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry*; D011550:Pseudomonas aeruginosa / Q000187:drug effects* / Q000502:physiology; D000077185:Resveratrol; D013267:Stilbenes / Q000032:analysis / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D001572:Benzofurans; D010936:Plant Extracts; D013267:Stilbenes; C091891:epsilon-viniferin; D000077185:Resveratrol